US11524344B2 - Rotationally asymmetric cutting insert having a single radially extending cutting-edge portion and rotary cutting tool - Google Patents

Rotationally asymmetric cutting insert having a single radially extending cutting-edge portion and rotary cutting tool Download PDF

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Publication number
US11524344B2
US11524344B2 US16/855,639 US202016855639A US11524344B2 US 11524344 B2 US11524344 B2 US 11524344B2 US 202016855639 A US202016855639 A US 202016855639A US 11524344 B2 US11524344 B2 US 11524344B2
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United States
Prior art keywords
insert
cutting
land
edge
imaginary
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US16/855,639
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US20210331256A1 (en
Inventor
Gil Hecht
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Iscar Ltd
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Iscar Ltd
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Application filed by Iscar Ltd filed Critical Iscar Ltd
Assigned to ISCAR, LTD. reassignment ISCAR, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HECHT, GIL
Priority to US16/855,639 priority Critical patent/US11524344B2/en
Priority to TW109143630A priority patent/TW202140196A/zh
Priority to IL296356A priority patent/IL296356B2/he
Priority to DE112021002465.5T priority patent/DE112021002465T5/de
Priority to PCT/IL2021/050375 priority patent/WO2021214747A1/en
Priority to CN202180030038.1A priority patent/CN115397591B/zh
Priority to KR1020227035730A priority patent/KR20230002414A/ko
Publication of US20210331256A1 publication Critical patent/US20210331256A1/en
Publication of US11524344B2 publication Critical patent/US11524344B2/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/0006—Drills with cutting inserts
    • B23B51/0007—Drills with cutting inserts with exchangeable cutting insert
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B27/00—Tools for turning or boring machines; Tools of a similar kind in general; Accessories therefor
    • B23B27/14—Cutting tools of which the bits or tips or cutting inserts are of special material
    • B23B27/141—Specially shaped plate-like cutting inserts, i.e. length greater or equal to width, width greater than or equal to thickness
    • B23B27/145—Specially shaped plate-like cutting inserts, i.e. length greater or equal to width, width greater than or equal to thickness characterised by having a special shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/04—Drills for trepanning
    • B23B51/0486—Drills for trepanning with lubricating or cooling equipment
    • B23B51/0493—Drills for trepanning with lubricating or cooling equipment with exchangeable cutting inserts, e.g. able to be clamped
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/04—Overall shape
    • B23B2200/0423—Irregular
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2200/00—Details of cutting inserts
    • B23B2200/04—Overall shape
    • B23B2200/0457—Pentagonal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/50—Drilling tools comprising cutting inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/06—Drills with lubricating or cooling equipment
    • B23B51/063—Deep hole drills, e.g. ejector drills
    • B23B51/066—Gun drills

Definitions

  • the present invention relates to a cutting insert rotatable about an insert axis having a single radially extending cutting-edge portion and a rotary cutting tool having such cutting insert, for use in metal cutting processes in general, and for drilling operations in particular.
  • U.S. Pat. No. 7,195,428 discloses a cutting tip bounded by an imaginary cylinder corresponding to the size of the hole being drilled, having a generally V-shaped tip flute extending the full length thereof.
  • the cutting tip is secured to the end of a shank by brazing or welding in a conventional manner so that tip flute is generally aligned with a shank flute.
  • a pair of raised narrow axial elongate wear pads are spaced about the periphery of the cutting tip, extending longitudinally, and raised slightly relative to the adjacent cylindrical surface of the cutting tip.
  • U.S. Pat. No. 7,296,953 discloses a deep hole drill comprising a cutter carrier, a replaceable cutting insert and at least one replaceable guide strip.
  • the cutter carrier in the form of a drill head, has a recess with its rear surface and two side surfaces forming a seat for the replaceable cutting plate.
  • a central threaded hole in the rear surface receives a screw guided through a through hole in the replaceable cutting plate.
  • recesses for guide strips are provided over the circumference of the drill, each guide strip abutting against a stop surface in the respective recess, and each stop surface having a central threaded hole for screwing the respective guide strip.
  • U.S. Pat. No. 7,393,162 discloses a gun-drill comprises a cutting-head detachably secured to a shank, having a common longitudinal axis and comprising mating peripheral surfaces.
  • a shank coupling portion comprising a forwardly tapering shank fixation surface is formed at a front end of the shank, and a cutting-head coupling portion comprising a forwardly tapering cutting-head fixation surface is formed at a rear end of the cutting-head.
  • Both the shank and the cutting-head coupling portion extend over a peripheral coupling angle of more than 180 degrees.
  • the shank and the cutting-head are assembled by positioning the cutting-head leading face in front of the shank trailing face, slidably inserting the cutting-head coupling portion into the shank coupling portion laterally to the axis of rotation and rotating the cutting-head relative to the shank in a direction opposed to the direction of rotation so that the cutting-head coupling portion and the shank coupling portion interlock co-axially.
  • a rotationally asymmetric cutting insert rotatable about an insert axis in a direction of cutting rotation, the insert axis defining an insert forward-rearward direction, the cutting insert comprising;
  • a rotary cutting tool comprising:
  • a tool shank extending along a shank axis defining a shank forward-rearward direction, the tool shank comprising spaced apart first and second protuberances protruding from a forward end portion thereof and an insert receiving slot located between the first and second protuberances;
  • the insert axis is coaxial with the shank axis
  • the insert's front surface faces in the shank forward direction.
  • FIG. 1 is a perspective view of a cutting insert in accordance with some embodiments of the present invention.
  • FIG. 2 is a front view of the cutting insert shown in FIG. 1 ;
  • FIG. 3 is a first side view the cutting insert shown in FIG. 1 ;
  • FIG. 4 is a second side view the cutting insert shown in FIG. 1 ;
  • FIG. 5 is a third side view the cutting insert shown in FIG. 1 ;
  • FIG. 6 is a fourth side view the cutting insert shown in FIG. 1 ;
  • FIG. 7 is a first perspective view of a rotary cutting tool in accordance with some embodiments of the present invention.
  • FIG. 8 is a second perspective view of the rotary cutting tool shown in FIG. 7 ;
  • FIG. 9 is an exploded perspective view of the rotary cutting tool shown in FIG. 7 ;
  • FIG. 10 is a forward end view of the rotary cutting tool shown in FIG. 7 ;
  • FIG. 11 is a forward end view of a tool shank of in accordance with some embodiments of the present invention.
  • FIG. 12 is a cross-sectional view of the tool shank shown in FIG. 11 , taken along the line XII-XII.
  • a first aspect of the present invention relates to a cutting insert 20 having opposing front and rear surfaces 22 , 24 interconnected by an insert peripheral surface 26 , and an insert axis AI defining an insert forward-rearward direction IF, IR.
  • the cutting insert 20 is rotatable about the insert axis AI in a direction of cutting rotation RC, and the insert peripheral surface 26 has opposing first and second side surfaces 28 , 30 spaced apart by first and second land surfaces 32 , 34 .
  • the cutting insert 20 is rotationally asymmetric about the insert axis AI (except for rotations that are multiples of 360 degrees).
  • the cutting insert 20 may preferably be manufactured by form pressing and sintering a cemented carbide, such as tungsten carbide, and may be coated or uncoated.
  • the cutting insert 20 may be of unitary one-piece construction.
  • a first land edge 36 extends rearwardly from the front surface 22 along the first land surface 32
  • a second land edge 38 extends rearwardly from the front surface 22 along the second land surface 34 .
  • the first and second land edges 36 , 38 are contained in an envelope surface 40 of an imaginary first cylinder C 1 having a circular cross-section and a cylinder axis AC coaxial with the insert axis AI, the imaginary first cylinder C 1 having a first diameter D 1 .
  • the imaginary first cylinder C 1 may undergo minute axial tapering in the rearward direction IR such that the first diameter D 1 is reduced by up to 0.01 mm along the length of the first land edge 36 .
  • the first land edge 36 may be formed at the intersection of the first side surface 28 and the first land surface 32
  • the second land edge 38 may be formed at the intersection of the second side surface 30 and the second land surface 34 .
  • the first land edge 36 extends rearwardly from a first end point N 1 . And since the first land edge 36 is (i) formed at the intersection of the first side surface 28 and the first land surface 32 and (ii) also extends rearwardly from the front surface 22 along the first land surface 32 , the first end point N 1 is located on all three (and thus at the intersection) of the front surface 22 , the first side surface 28 and the first land surface 32 .
  • the first end point N 1 and the insert axis AI may be contained in a first insert plane PI 1 .
  • the first land edge 36 may be straight and parallel to the insert axis AI.
  • the first land edge 36 may intersect the rear surface 24 .
  • the second land surface 34 may include a first support surface 42 contained in the envelope surface 40 of the imaginary first cylinder C 1 .
  • the first support surface 42 may circumferentially extend from the second land edge 38 in the direction opposite to the direction of cutting rotation RC.
  • the first support surface 42 may be entirely located in a first imaginary quadrant Q 1 of four imaginary quadrants Q 1 , Q 2 , Q 3 , Q 4 defined by the first insert plane PI 1 intersecting a second insert plane PI 2 perpendicular thereto and containing the insert axis AI.
  • the first support surface 42 may intersect the front surface 22 .
  • the first support surface 42 may intersect the rear surface 24 .
  • the first support surface 42 may be spaced apart from the first side surface 28 by a first intermediate surface 44 .
  • the first intermediate surface 44 may be located radially inward of the envelope surface 40 of the imaginary first cylinder C 1 .
  • the first intermediate surface 44 may be planar, in the form of an axially extending chamfer.
  • a first front edge 46 is formed at the intersection of the front surface 22 and the first side surface 28 , and the first front edge 46 includes a radially extending cutting-edge portion 48 .
  • the cutting-edge portion 48 may extend radially outwardly to the first land edge 36 .
  • the cutting-edge portion 48 may have a radially outermost cutting point NRO contained in the envelope surface 40 of the imaginary first cylinder C 1 .
  • the radially outermost cutting point NRO may be coincident with the first end point N 1 of the first land edge 36 .
  • the first side surface 28 includes a rake surface 50 adjacent the cutting-edge portion 48 , facing in the direction of cutting rotation RC.
  • the rake surface 50 may be a planar sub-surface of the first side surface 28 .
  • the rake surface 50 may include a recess or a plurality of recesses in the first side surface 28 .
  • the front surface 22 includes a relief surface 51 adjacent the cutting-edge portion 48 .
  • the relief surface 51 may be multi-faceted.
  • a second front edge 52 is formed at the intersection of the front surface 22 and the second side surface 30 , and the second front edge 52 is devoid of a cutting-edge portion.
  • the cutting insert 20 may be termed as having a single radially extending cutting-edge portion.
  • the cutting insert 20 may not exhibit rotational symmetry about the insert axis AI. As such, the cutting insert 20 is considered to be rotationally asymmetric about the insert axis AI.
  • an imaginary cutting profile PC formed by rotating the cutting-edge portion 48 360 degrees about the insert axis AI is located axially forward of the entire second front edge 52 .
  • the imaginary cutting profile PC may be located axially forward of any edge associated with the front surface 22 , apart from the cutting-edge portion 48 itself, which defines the imaginary cutting profile PC.
  • the imaginary cutting profile PC may define a cutting diameter DC corresponding to the first diameter D 1 .
  • the cutting-edge portion 48 may extend radially outwardly from the insert axis AI.
  • the cutting-edge portion 48 may have a radially innermost cutting point NRI coincident with the insert axis AI.
  • the radially innermost cutting point NRI may also be coincident with a center point NC of the imaginary cutting profile PC.
  • the radial innermost cutting point NRI may be located axially forward of the radial outermost cutting point NRO.
  • the cutting-edge portion 48 may have an axially forwardmost cutting point NF located radially mid-way between the insert axis AI and the envelope surface 40 of the imaginary first cylinder C 1 .
  • the cutting insert 20 is of unitary one-piece construction and manufactured by form pressing and sintering a cemented carbide
  • several insert sizes of different cutting diameters DC may be advantageously produced from same-sized form-pressed green bodies, by applying a post-sintering process step, for example, grinding.
  • the first insert plane PI 1 may contain the entire cutting-edge portion 48 .
  • the first insert plane PI 1 may contain the entire first front edge 46 .
  • the cutting insert 20 is entirely located in just the first and second quadrants Q 1 , Q 2 described above.
  • the first side surface 28 may be planar.
  • the cutting insert 20 may be used for drilling operations, whereby radial support within a workpiece (not shown) is advantageously provided at least by the integrally formed first support surface 42 .
  • a shoulder portion 54 may protrude from the second side surface 30 .
  • the shoulder portion 54 may have a second support surface 56 contained in the envelope surface 40 of the imaginary first cylinder C 1 .
  • the second support surface 56 may intersect the front surface 22 .
  • the second support surface 56 may be entirely located in a second imaginary quadrant Q 2 adjacent to the first imaginary quadrant Q 1 and separated therefrom by the second insert plane PI 2 .
  • a high level of radial support within a drilled hole of the workpiece is provided.
  • the first land surface 32 may include a third support surface 58 contained in the envelope surface 40 of the imaginary first cylinder C 1 .
  • the third support surface 58 may circumferentially extend from the first land edge 36 in a direction opposite to the direction of cutting rotation RC.
  • the third support surface 58 may intersect the front surface 22 .
  • the third support surface 58 may intersect the rear surface 24 .
  • the second support surface 56 may be spaced apart from the third support surface 58 by a second intermediate surface 60 .
  • the second intermediate surface 60 may be located radially inward of the envelope surface 40 of the imaginary first cylinder C 1 .
  • the shoulder portion 54 may be joined to the first land surface 32 via the second intermediate surface 60 .
  • the second intermediate surface 60 may be planar.
  • the third support surface 58 may be entirely located in the second imaginary quadrant Q 2 .
  • the first, second and third support surfaces 42 , 56 , 58 located in the first and second imaginary quadrants Q 1 , Q 2 , such that the two imaginary quadrants Q 3 , Q 4 located on the opposite side of the first insert plane PI 1 are devoid of support surfaces
  • sufficient lateral movement of the cutting insert 20 perpendicular to the insert axis AI may be enabled within the workpiece, such that the cutting insert 20 can be released from the workpiece without snagging.
  • the shoulder portion 54 may include an abutting surface 62 facing away from the first land surface 32 .
  • the abutting surface 62 may be located radially inward of the envelope surface 40 of the imaginary first cylinder C 1 , adjacent the second support surface 56 .
  • the abutting surface 62 may be located in the second imaginary quadrant Q 2 , facing the second insert plane PI 2 .
  • the abutting surface 62 may be planar.
  • the abutting surface 62 may be inclined at an abutment angle ⁇ 1 of less than 10 degrees with the second insert plane PI 2 , when viewed along the insert axis AI.
  • the abutting surface 62 may be parallel to the second insert plane PI 2 .
  • a second aspect of the present invention relates to a rotary cutting tool 64 having a tool shank 66 extending along a shank axis AS defining a shank forward-rearward direction SF, SR, and the cutting insert 20 releasably secured to the tool shank 66 .
  • the tool shank 66 has circumferentially spaced apart first and second protuberances 68 , 70 protruding axially from a forward end portion 72 thereof, and the cutting insert 20 is located in an insert receiving slot 74 between the first and second protuberances 68 , 70 .
  • the tool shank 66 may include at least one coolant passage 75 a , 75 b axially extending through the first protuberance 68 .
  • the insert axis AI is coaxial with the shank axis AS, and the insert's front surface 22 faces in the shank forward direction SF.
  • At least a portion of the insert's front surface 22 may be positioned axially forward of the first and second protuberances 68 , 70 to an extent which allows regrinding of the front surface 22 and re-use of the cutting insert 20 following wear and/or damage of the original cutting-edge portion 48 .
  • the tool shank 66 may have a generally cylindrical shank peripheral surface 76 with a shank diameter DS, and the shank diameter DS may be less than the first diameter D 1 .
  • a shank flute 78 may be formed in the shank peripheral surface 76 extending rearwardly from the forward end portion 72 .
  • shank flute 78 may not extend along the entire axial length of the tool shank 66 .
  • the rotary cutting tool 64 may be used for drilling operations.
  • the rotary cutting tool 64 may be used for drilling holes of considerable depths relative to the cutting diameter DC, i.e. deep drilling, also called deep hole drilling.
  • the insert's first side surface 28 may include a first fixing surface 80 facing in the direction opposite to the direction of cutting rotation RC.
  • the first fixing surface 80 may intersect the second land surface 34 .
  • the first fixing surface 80 may be a planar sub-surface of the first side surface 28 .
  • a first clamping surface 81 of the first protuberance 68 may make contact with the first fixing surface 80 .
  • the insert's second side surface 30 may include three co-planar second fixing surfaces 82 a , 82 b , 82 c , spaced apart from each other.
  • the three second fixing surfaces 82 a , 82 b , 82 c may be parallel to the first fixing surface 80 .
  • a second clamping surface 83 of the second protuberance 70 may make contact with at least one of the three second fixing surfaces 82 a , 82 b , 82 c.
  • the second clamping surface 83 may face the first clamping surface 81 .
  • an insert opening 84 may extend from the insert's first side surface 28 to the insert's second side surface 30 .
  • the insert opening 84 may be asymmetrically located with respect to the insert axis AI.
  • the insert opening 84 may extend to the rear surface 24 .
  • the insert opening 84 may open out to insert's first and second side surfaces 28 , 30 and also to the insert's rear surface 24 .
  • the rear surface 24 may comprise two spaced apart rear sub-surfaces 24 a , 24 b.
  • the insert opening 84 may be in the form of an insert through bore, extending from the first side surface 28 to the second side surface 30 .
  • a clamping bolt 86 may extend through the insert opening 84 and clamp the first and second protuberances 68 , 70 against the insert's first and second side surfaces 28 , 30 , respectively.
  • the insert opening 84 may open out to the first fixing surface 80 of the insert's first side surface 28 .
  • configuring the insert opening 84 to be asymmetrically located with respect to the insert axis AI may advantageously reduce the risk of incorrectly assembling the rotary cutting tool 64 .
  • the cutting insert 20 can be removed and replaced without disengaging the clamping bolt 86 from the shank threaded bore 90 in the first protuberance 68 , but rather just by releasing the clamping force between the first and second protuberances 68 , 70 .
  • the countersink hole 92 may have a larger diameter than the shank through bore 88 to provide sufficient space for a bolt head 94 of the clamping bolt 86 .
  • two coplanar regions of the rear sub-surfaces 24 a , 24 b may make contact with the bottom surface 96 of the insert receiving slot 74 .
  • the insert's rear surface 24 may be inclined in the insert rearward direction IR from the first land surface 32 to the second land surface 34 .
  • the insert receiving slot's bottom surface 96 may be correspondingly inclined therewith.
  • the abutting surface 62 of the insert's shoulder portion 54 may make contact with an abutment wall 98 of the second protuberance 70 .
  • the inclination of the insert's rear surface 24 and the insert receiving slot's bottom surface 96 may advantageously promote contact between the abutting surface 62 and the abutment wall 98 during use of the rotary cutting tool 64 in drilling operations.
  • the abutting surface 62 may only make contact with a vertical edge 99 of the abutment wall 98 .
  • the shank flute 78 may be located on the first plane side S 1 of the first shank plane PS 1 .
  • the shank axis AS may be located on the first plane side S 1 of the first shank plane PS 1 .
  • the shank flute 78 may communicate with the insert receiving slot 74 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)
  • Milling Processes (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
US16/855,639 2020-04-22 2020-04-22 Rotationally asymmetric cutting insert having a single radially extending cutting-edge portion and rotary cutting tool Active 2040-12-20 US11524344B2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
US16/855,639 US11524344B2 (en) 2020-04-22 2020-04-22 Rotationally asymmetric cutting insert having a single radially extending cutting-edge portion and rotary cutting tool
TW109143630A TW202140196A (zh) 2020-04-22 2020-12-10 具有單一徑向延伸切削刃部的可旋轉之不對稱切削嵌件、及旋轉切削刀具
PCT/IL2021/050375 WO2021214747A1 (en) 2020-04-22 2021-04-05 Rotationally asymmetric cutting insert having a single radially extending cutting-edge portion and rotary cutting tool
DE112021002465.5T DE112021002465T5 (de) 2020-04-22 2021-04-05 Rotationsasymmetrischer Schneideinsatz mit einem einzelnen sich radial erstreckenden Schneidkantenabschnitt und Rotationsschneidwerkzeug
IL296356A IL296356B2 (he) 2020-04-22 2021-04-05 שימת חיתוך א-סימטרי בסיבוב בעל שפת חיתוך יחיד רדיאלי וכלי חיתוך סיבובי
CN202180030038.1A CN115397591B (zh) 2020-04-22 2021-04-05 具有单个在径向上延伸的切削刃部分的旋转不对称切削刀片和旋转切削刀具
KR1020227035730A KR20230002414A (ko) 2020-04-22 2021-04-05 단일 반경방향 연장 절삭 엣지부를 갖는 회전 비대칭 절삭 인서트 및 회전 절삭 공구

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US16/855,639 US11524344B2 (en) 2020-04-22 2020-04-22 Rotationally asymmetric cutting insert having a single radially extending cutting-edge portion and rotary cutting tool

Publications (2)

Publication Number Publication Date
US20210331256A1 US20210331256A1 (en) 2021-10-28
US11524344B2 true US11524344B2 (en) 2022-12-13

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US16/855,639 Active 2040-12-20 US11524344B2 (en) 2020-04-22 2020-04-22 Rotationally asymmetric cutting insert having a single radially extending cutting-edge portion and rotary cutting tool

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US (1) US11524344B2 (he)
KR (1) KR20230002414A (he)
CN (1) CN115397591B (he)
DE (1) DE112021002465T5 (he)
IL (1) IL296356B2 (he)
TW (1) TW202140196A (he)
WO (1) WO2021214747A1 (he)

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Publication number Priority date Publication date Assignee Title
JP2025185813A (ja) 2024-06-11 2025-12-23 株式会社タンガロイ 切削インサート及び切削工具
JP2025185838A (ja) 2024-06-11 2025-12-23 株式会社タンガロイ 切削インサート及び切削工具

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US7195428B2 (en) 2002-11-11 2007-03-27 Ford Global Technologies, Llc Gundrill
US7296953B2 (en) 2002-12-19 2007-11-20 Joerg Guehring Deep hole drill
US7393162B2 (en) 2004-08-23 2008-07-01 Iscar Ltd. Gun drill
DE102018001056A1 (de) 2018-02-07 2019-08-08 Institut für innovative Technologien, Technologietransfer, Ausbildung und berufsbegleitende Weiterbildung (ITW) e. V. Einlippenbohrer mit Wechselkopf für das Tiefbohren

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FR2840829B1 (fr) * 2002-06-14 2005-01-14 Diager Plaquette de coupe pour foret, et outil de percage utilisant cette plaquette
IL180660A0 (en) * 2007-01-11 2007-06-03 Iscar Ltd Cutting tool and cutting insert
US10076794B2 (en) * 2016-07-11 2018-09-18 Iscar, Ltd. Star-shaped cutting insert for a front and back chamfering rotary milling cutter

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Publication number Priority date Publication date Assignee Title
US3422706A (en) * 1965-08-06 1969-01-21 Int Nickel Co Gun drill
US3776656A (en) 1972-09-25 1973-12-04 Erickson Tool Co Spade drill
US4212569A (en) * 1977-10-06 1980-07-15 Sandvik Aktiebolag Tubular drill tool
US4437802A (en) * 1981-09-14 1984-03-20 Hall Jr John J Boring tool having a detachable cutting blade
US4813824A (en) 1986-08-27 1989-03-21 Stellram, S.A. Single-lip drilling tool
US4854789A (en) 1987-10-27 1989-08-08 Nytd Industries Inc. Cutting tool assembly
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CN115397591A (zh) 2022-11-25
IL296356B1 (he) 2025-06-01
DE112021002465T5 (de) 2023-02-09
US20210331256A1 (en) 2021-10-28
TW202140196A (zh) 2021-11-01
IL296356B2 (he) 2025-10-01
KR20230002414A (ko) 2023-01-05
IL296356A (he) 2022-11-01
WO2021214747A1 (en) 2021-10-28
CN115397591B (zh) 2025-09-16

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